Window lock



FIG. 1 is a front and left side perspective view of a window lock showing my new design;

FIG. 2 is an exploded rear and left side perspective view thereof, the right side being a mirror image thereof;

FIG. 3 is an exploded front and left perspective view thereof; and,

FIG. 4 is a rear and left perspective view thereof.

The broken lines showing of a square engagement shank in FIG. 1 is for illustrative purpose only and forms no part of the claimed design. 

The ornamental design for a window lock, as shown and described herein. 